Welcome to the QBleed® risk calculator

Welcome to the QBleed® Web Calculator. You can use this calculator to work out your risk of having a haemorrhage, and how this is affected by starting anticoagulants, by answering some simple questions.

The QBleed® algorithms have been developed by Julia Hippisley-Cox and Carol Coupland and are based on routinely collected data from many thousands of GPs across the country who have freely contributed data to the QResearch database for medical research, linked to hospital and mortality data.

QBleed® has been developed for the UK population, and is intended for use in the UK.
This website is primarily intended for doctors and nurses working in general practice and for academics who are interested in the underlying research. Patients are welcome to read this information and use the calculator together with their doctor so that any symptoms or concerns can be addressed within a health care setting. All medical decisions need to be taken by a patient in consultation with their doctor. The authors and the sponsors accept no responsibility for clinical use or misuse of this score.

The science underpinning the new QBleed® equations has been published in the BMJ. See the publications page for details.

Materials on this web site are protected by copyright law. Access to the materials on this web site for the sole purpose of personal educational and research use only. Where appropriate a single print out of a reasonable proportion of these materials may be made for personal education, research and private study. Materials should not be further copied, photocopied or reproduced, or distributed in electronic form. Any unauthorised use or distribution for commercial purposes is expressly forbidden. Any other unauthorised use or distribution of the materials may constitute an infringement of ClinRisk Ltd.'s copyright and may lead to legal action.

For avoidance of doubt, any use of this site as a web service to obtain a QBleed score for any purpose is expressly forbidden. Similarly, use of this website for developing or testing software of any sort is forbidden unless permission has been explicitly granted.